Click to expand Tap to zoom Ace1Arms M4/M16 CNC Air Seal Nozzle by Ace1Arms Save Liquid error (snippets/product-badge line 32): Computation results in '-Infinity'% $6.99 SKU ACE-ASN-M4DO 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Features 7075 aviation Aluminum Construction CNC technology Surface treatment: Hard anodic oxidation Grooved Outlet Aperture O-Ring for better seal Measurement: 21.48mm